James andrew stout



(No Model. r

J. A. STOUT. I SUPERHEATING ATTACHMENT FOR STEAM BOILERS. No. 292,146.Patented Jan. 15,1884.

xvi J! l iii 4,2,

WITNESSES: VENTOR':

ATTORNEYS.

'UNITED STATES PATENT @FFICE JAMES ANpREw sronr, OFBELLEVILLE,ILLT-NoIs, ASSIGNOR TO THE HA1 RISON MACHINE woRKsoF-sAMn PLACE.

STUPERHEATING ATTACHMENT FOR STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent No. 292,146, dated January15, 1884. I

Application filed November 20, 1833. (No modelJ To all whom it mayconcern Be it known that I, J AMES ANDREW S'roUr, of Belleville, in thecounty of St. Clair and State of Illinois, have invented certain new.and useful Improvements in Superheating Attacl ments for Steam-Boilers,of whichthe following is a. full, clear and exact description.

This invention is mainly designed for steamboilers of portable andtraction engines, and relates to that class of superheaters forsteamboilers in which a snperheating steam-drum, composed of inner andouter casings, is combined with the chimney in such manner that thesteam from the boiler is passed into the chamber or space between saidcasings, and superheated by the gaseous products of combustion as theypass through the drum to the chimney.

The object of the invention isto make such superheater so that it shallbe a complete steam-tight structure within itself, independently of theboiler, and capable of easy attachment, and of detachment for repairs,the said superheater to take the place and answerthe purpose of theordinary steam-dome, and serving to prevent foaming or priming; also, toeconomize both fuel and water.

The invention consists in a novel construction of said dome, which hasits heads formed of cast-metal rings at its opposite ends, and which iscombined with the smoke-box end of the boiler, the upper one of saidrings. preferably being made with a hingejoint for attachment of araising and lowering smoke-stack;

also, the domehavin g combined with ita steamsupply pipe connecting itwith the boiler, substantially as hereinafter described.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in

which similar letters of reference indicate cor-' responding parts inall the figures.

Figure 1 represents a side elevation of the smoke-box end of a tubularsteam-boiler, such as used for portable engines, with my inventionapplied; Fig. 2, a vertical longitudinal section of the same in part;Fig. 3, a perspective view of the upper cast. ring of the dome, and

Fig. 4 a vertical section of the lower ring thereof. e

A indicates the boiler, and B its smokebox end, over and in opencommunication with which the superheating steam drum or dome isarranged. This steam-dome has its heads or lower and upper endsconstructed of two cast-iron rings, 0 D, having rivet-holes I) cast inthem, and which are connected by an inner shell, E, and outer shell, F,bent to conform, respectively, to the inner and outer peripheralsurfaces of the rings, and united with each other and with the rings byrivets c. This makes the drum an independent structure complete initself, the space between the shells E F forming thesuperheating-chamber, and theinterior spacethe passage for thegaseousproducts of combustion from the smoke-box end of the boiler tothe chimney or stack. The lower ring, 0, is made to conform to thecircular shape of the boiler,which it fits like a saddle, and maybesecured thereto by bolts passing through ears d (I, cast on said ring.The upper ring, D, is straight on top, and is provided with a lug, e, ontop to form a hinge-joint with corresponding proj ections, f, on thelower ring of the smoke-stack G. This forms a cheap, simple, and strongattachment for the smoke- 7 stack, the lowering or falling of whichprovides for the engine and boiler passing under overhead obstacles inthe road or for entering barns and other places.

The whole construction of the drum is a 86 cheap, simple, and strongone, -the riveting of the shells composing it to the rings at each endalso admitting of ordinary boiler-iron being used for said shells in theplace of 'a more expensive quality of iron, as in hollowshellsteam-drums having flanges at their ends for attachment by riveting toan uptake-flange at the one end of the drum-and to the chimney at theother end. The bolting of the lower ring to the boiler, too, inmyimproved super- 0 heater admits of amuch cheaper and readierattachmentto and detachment of it from the boiler. v

' H is a bent pipe connecting the upper portion of the steam-space ofthe boiler with the 5 snperheating steam-chamber of the drum at adistance alittle above the lower ring, C,to provide, by condensation,for the accumulation of water in the lower portion of said chamber, toprevent overheating and cracking of the metal of the drum when firstfiringj The superheated steam is taken from the drum to work the is madeto lit the boiler as asaddle,and is provided with the securing lugs orears (I, and of inner and outer wrought-metal shells, E F, 15 unitedwith each other and with the rings C l D by rivets passing through theshells and 1 rings, and the inlet and outlet pipes, substan l tially asset forth. 1

J AMES ANDRE\V SIFOU T.

\Vitncsses:

A. G. BADGLEY, W, L. IIEPER.

